Traffic in Beijing is frequently snarled, in part because                      of the excessive number of low-grade taxis and other similar                      vehicles that the city has licensed in recent years, the shortage                      of north-south roadways, and metro and light-rail links. The                      phasing out of the small, uncomfortable Xiali taxis, manufactured                      in Tianjin, which in 2001 accounted for 77.5% of the 67,000                      taxis licensed to operate in Beijing, was markedly accelerated                      in early 2002.